<template>
  <div class="post-detail-page">
    <modal
      title="删除文章"
      :visiable="modalIsVisible"
      @modal-on-close="modalIsVisible = false"
      @modal-on-confirm="hideAndDelete"
    >
      <p>确定要删除这篇文章</p>
    </modal>
    <article class="w-75 max-auto mb-5 pb-3" v-if="currentPost">
      <img
        v-if="currentImageUrl"
        :src="currentImageUrl"
        :alt="currentPost.title"
        class="rounded-lg img-fluid my-4"
      />
      <h2 class="mb-4">{{ currentPost.title }}</h2>
      <div
        class="
          user-profile-component
          border-top border-bottom
          py-3
          mb-5
          align-items-center
          row
          g-0
        "
      >
        <div class="col">
          <user-profile
            :user="currentPost.author"
            v-if="typeof currentPost.author === 'object'"
          ></user-profile>
        </div>
        <span class="text-muted col text-right font-italic"
          >发表于: {{ currentPost.createdAt }}</span
        >
      </div>
      <div v-html="currentHTML"></div>
      <div v-if="showEditArea" class="btn-group mt-5">
        <router-link
          :to="{ name: 'create', query: { id: currentPost._id } }"
          type="button"
          class="btn btn-success"
          >编辑</router-link
        >
        <button
          type="button"
          class="btn btn-danger"
          @click.prevent="modalIsVisible = true"
        >
          删除
        </button>
      </div>
    </article>
  </div>
</template>

<script lang="ts">
import { computed, defineComponent, onMounted, ref } from "vue";
import UserProfile from "@/components/UserProfile.vue";
import { useStore } from "vuex";
import {
  GlobalDataProps,
  ImageProps,
  PostProps,
  UserProps,
  ResponseType,
} from "@/store";
import { useRoute, useRouter } from "vue-router";
import MarkDownIt from "markdown-it";
import Modal from "@/components/Modal.vue";
import createMessage from "@/components/createMessage";

export default defineComponent({
  components: {
    UserProfile,
    Modal,
  },
  setup() {
    const store = useStore<GlobalDataProps>();
    const route = useRoute();
    const router = useRouter();

    const currentId = route.params.id;

    const md = new MarkDownIt();

    const modalIsVisible = ref(false);
    const hideAndDelete = () => {
      modalIsVisible.value = false;
      store
        .dispatch("deletePost", currentId)
        .then((rawData: ResponseType<PostProps>) => {
          createMessage("删除成功，2秒后跳转到专栏首页", "success", 2000);
          setTimeout(() => {
            router.push({
              name: "column",
              params: { id: rawData.data.column },
            });
          }, 2000);
        });
    };

    onMounted(() => {
      store.dispatch("fetchPost", currentId);
    });
    const currentPost = computed<PostProps>(() =>
      store.getters.getCurrentPost(currentId)
    );

    console.log("当前文章", currentPost.value);

    const currentHTML = computed(() => {
      const { content, isHTML } = currentPost.value;
      if (currentPost.value && content) {
        return isHTML ? content : md.render(content);
      }
    });

    const showEditArea = computed(() => {
      const { isLogin, _id } = store.state.user;
      if (currentPost.value && currentPost.value.author && isLogin) {
        const postAuthor = currentPost.value.author as UserProps;
        return postAuthor._id === _id;
      } else {
        return false;
      }
    });

    const currentImageUrl = computed(() => {
      if (currentPost.value && currentPost.value.image) {
        const { image } = currentPost.value;
        return (image as ImageProps).url + "?x-oss-process=image/resize,w_850";
      } else {
        return null;
      }
    });

    return {
      currentPost,
      currentHTML,
      currentImageUrl,
      showEditArea,
      modalIsVisible,
      hideAndDelete,
    };
  },
});
</script>



